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K. WANDEL.

MANUFACTURE AND CRINKLING 0F PAPER.

APPLICATION FILED APR, 6. 1920.

@In www Patented Nov. 2l, 1922.

""MNITED STATES PATENT QFFIQE..

KURT WAN DEL, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TARKELL SAFETY BAG COMPANY, OF NEW' YGRK, N. Y., A CORPORATION Ofi? N'El/v YORK.

MANUFACTUR-E AND CRINKLING OF PAPER.

Application led April 6,

T 0 all i/r/z oni-flmfolz/ concern i Be it lrnown that I, KURT WANDEL, a citi- Zen of Wurtemberg, who have declared my intention of becoming a citizen of the United States, and resident of New York city, county of New York, State of New York, have invented an Improvement in they Manufacture and Crinlrling of Paper, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the 'drawings representingflike parts in each of the several views.

This invention relates to the manufacture of paper and the crinkling thereof to render the same stretchable. More particularly the invention has to do with an improvement in crinkled paper manufacture wherein a crinklin device equipped with a suction roll cri ling drum is employed associated with, and in combination with, a paper mill or with an apparatus for finishing or treating paper. It is not new to combine a paper crinlrling device with a paper mill to crinkle the freshly made paper but in the prior art so far as known to me, the crinkling ap aratus available has required that the paper web be subjected to its operation while it is still very soft and tender, i. e., before it is subjected to the action of the drier rolls. On account of the delicacy and weakness of the paper at this stage, this limitation has very materially reduced the speed at which the paper mill could be operated to produce crinkled paper, and the manufacture of crinkled paper at the mill has thus involved -an'econo'mical loss in lowering the capacity! of the mill as a whole. Further, paper crinkled at this stage of its manufacture, i. e.before it is compacted and calendered by the driers is not so tough and strong as the same paper would be had it gone through the drier system. Still further, when the paper is crinkled after it comes from the last press roll and before it enters the drier system, it is caught between the drier felt of the drier drums and the fresh made crinkles are largely flattened down and pressed back into the web so that the stretchable quality of the paper cannot be made use of so readily. I have found that by the use of a crinlrling device equipped with a suction roll crinlrling drum, the paper may be crinkled satisfactorily after it has passed through most, or all, of the drier system, and

1920. Serial No. 371,577.

thereby I am enabled to obtain the advantage ofthe driers in calandering und strcngtlb ening the paper so that the crinkled paper produced is a much stronger and more satisfactory product, and since the paper when it leaves the crinlrling device is largely calendered and dried it is tough and strong enough so that no reduction in the normal speed of the paper mill is required. rEhe foregoing and other objects and advantages of the invention will more fully appear from the following detailed description, and the distinctive features of novelty will thereafter be pointed out in the appended claims.

The drawing shows a diagrammatic side elevation, illustrating the application of the invention to an ordinary Fourdrinier paper machine.

Referring to the drawing 10 indicates the system of press rolls and felts of the machine by which the paper web is made into a coherent sheet. 1.0a indicates the nal set of press rolls from which the paper web W is transferred to the system of drier drums 11. The paper web at this stage is still very soft and delicate and still saturated with moisture. In accordance with my invention, instead of creping the paper at this point as has heretofore been the common practice, the paper is run through a substantial part of the drier system, preferably through the major portion thereof, so that most of the moisture is extracted therefrom and the paper condensed and calendered, and thus made relatively strong and tough, and substantially finished. YFrom these driers the web is led onto a crinlrling drum 12 which is in the form of a rotarily driven suction roll produced as a hollow shell with multiple perforations throughout the operative eX- tent thereof adapted to communicate with a suction box 13 stationarily mounted within the shell just back of the point at which the paper is crinkled or creped. A suitable doctor or clearer 14 is mounted for co-operation with the crinkling drum to clear the paper therefrom while the paper is held adherent to lthe surface of the drum by the suction action, to produce a crinlrled web as indicated at W. The structure and manner of operation of this suction roll or crinkling device is more fully shown and claimed in my earlier application, `Serial Number 346,066, filed December 19, 1919. With the use of such a suction roll crinkling device the paper 2 naal-3,12?

may be crinkled in a practicable and satisfactory manner when it 1s nearly or substantially dry and hence it is possible to locate this crinkling device so as to handle the butes thereof, and I therefore desire thepresent embodiment to be considered in all respects as illustrative and not restrictive,ref

kerence being had to the appended claims rather than to the foregoing descriptionl to indicate the scope of the invention.

.Having described my invention what I claim as new and desire to secure by Letters Patent is;

1. The combination with a machine Yfor Vmaking a papel-Web including drier mechanism7 of crinkling mechanism disposed and arranged to act on the ypaper Web after it has passed through a substantial part of said drier mechanism, and including a crinkling drum formed as a suction roll and having a suction box co'operative therewith.

2. The combination With a machine for makinga paper Web, and includingadrier system,. of crinkling mechanism disposed and arranged to act on the paper Web after it'has passed through a substantial part of said drier system, and including a crinkling drum equipped vWith means for causing the paper Web to adhere to it by air suction.

3. The combination With a machine for making a paper Web including drier mechanism, of crinkling mechanism arranged and disposed to act on the paper web after itfhas been'acted on by said drier mechanismand including a crinkling drum With a doctor co-operativetherewith, said crinkling drum equipped vwith means for causing paper to adhere to it byair suction. f f

fl. The combination with a paper making machine formaking paper in the Web ofa crinlling mechanism operating on the *freshly finished paper, said mechanism comprising a crinkling drumv and pneumatic` means for causing the paper web to adhere yto the `crinlzling drum.

In ltestimony whereof, I have signed, my name lto this specification.

KURT WANDEL; .l i' 

